It was great.
Not bad for your first effort in flash programming. There were a few annoyances (that screaming guy during the intro) and bugs, but otherwise it was nice. The hit detection system was flawless.
You might wanna make the sections in between the actual shooting flow better (i.e. lose the arrows) and maybe have the gun follow the cursor, amongst other suggestions.
That side, it's a great game! Can't wait to see you improve upon it.